The problem companies face when they hire a lot of people is that you have to put those people somewhere so that they can work. Over the last 20 years, two trends have become commonplace: cubicles and open offices. These two methods have one thing in common: they trade space for productivity.
The cubicle surrounds a desk with a set of walls, giving employees a semi-private workspace. Initially, most cubicles were high enough that most people could not look over the walls to see you, but more recently, the trend has been to create half-height cubicles, which creates a more open feel to the office.
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